Sulfur Dioxide Nonattainment Areas

As of November 13, 2009

PRIMARY, SECONDARY

East Helena Area (Lewis and Clark Co.), MT

Salt Lake Co, UT

Tooele Co, UT

Warren Co, NJ

PRIMARY

Armstrong Co, PA

Hayden (Pinal County), AZ

Laurel Area (Yellowstone County), MT

Piti, GU

Tanguisson, GU

This is NOT an official list of SO2 areas. See the Code of Federal Regulations (40 CFR Part 81) and pertinent Federal Register notices for legal lists and boundaries.

Sulfur Dioxide Nonattainment Areas

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